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Issue 817483003: delete observe from the repo (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 6 years ago
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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file.
4
5 library observe.src.metadata;
6
7 /// Use `@observable` to make a field automatically observable, or to indicate
8 /// that a property is observable. This only works on classes that extend or
9 /// mix in `Observable`.
10 const ObservableProperty observable = const ObservableProperty();
11
12 /// An annotation that is used to make a property observable.
13 /// Normally this is used via the [observable] constant, for example:
14 ///
15 /// class Monster extends Observable {
16 /// @observable int health;
17 /// }
18 ///
19 // TODO(sigmund): re-add this to the documentation when it's really true:
20 // If needed, you can subclass this to create another annotation that will
21 // also be treated as observable.
22 // Note: observable properties imply reflectable.
23 class ObservableProperty {
24 const ObservableProperty();
25 }
26
27
28 /// This can be used to retain any properties that you wish to access with
29 /// Dart's mirror system. If you import `package:observe/mirrors_used.dart`, all
30 /// classes or members annotated with `@reflectable` wil be preserved by dart2js
31 /// during compilation. This is necessary to make the member visible to
32 /// `PathObserver`, or similar systems, once the code is deployed, if you are
33 /// not doing a different kind of code-generation for your app. If you are using
34 /// polymer, you most likely don't need to use this annotation anymore.
35 const Reflectable reflectable = const Reflectable();
36
37 /// An annotation that is used to make a type or member reflectable. This makes
38 /// it available to `PathObserver` at runtime. For example:
39 ///
40 /// @reflectable
41 /// class Monster extends ChangeNotifier {
42 /// int _health;
43 /// int get health => _health;
44 /// ...
45 /// }
46 /// ...
47 /// // This will work even if the code has been tree-shaken/minified:
48 /// final monster = new Monster();
49 /// new PathObserver(monster, 'health').changes.listen(...);
50 class Reflectable {
51 const Reflectable();
52 }
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